Math Problem Statement

dt x->0 SINX/LOG(1+X)^(1/2)

Solution

The given expression is the limit as x0x \to 0 of sin(x)log(1+x)\frac{\sin(x)}{\sqrt{\log(1+x)}}:

limx0sin(x)log(1+x)\lim_{x \to 0} \frac{\sin(x)}{\sqrt{\log(1+x)}}

To solve this, let's first analyze the behavior of both the numerator and the denominator as x0x \to 0.

  1. Numerator: As x0x \to 0, \sin(x) \approx x \quad \text{(since \sin(x)behaveslikebehaves likex near zero)}. So, sin(x)0\sin(x) \to 0 as x0x \to 0.

  2. Denominator: For small values of xx, we can approximate log(1+x)\log(1+x) using the first term in its Taylor expansion: \log(1+x) \approx x \quad \text{(since \log(1+x) \approx xforsmallfor smallx)}. Hence, log(1+x)x.\sqrt{\log(1+x)} \approx \sqrt{x}.

Now the expression becomes:

limx0xx=limx0x.\lim_{x \to 0} \frac{x}{\sqrt{x}} = \lim_{x \to 0} \sqrt{x}.

As x0x \to 0, x0\sqrt{x} \to 0.

Thus, the limit of the given expression as x0x \to 0 is:

0.\boxed{0}.

Would you like more details or have any questions?

Here are 5 related questions to explore:

  1. What is the Taylor expansion of sin(x)\sin(x)?
  2. How can L'Hopital's rule be applied to limits like this one?
  3. What are the general properties of logarithmic functions near zero?
  4. Can you approximate higher-order terms in the expansion of log(1+x)\log(1+x)?
  5. What is the limit of sin(x)log(1+x)\frac{\sin(x)}{\log(1+x)} as x0x \to 0?

Tip: In many limits involving trigonometric and logarithmic functions, approximations using Taylor series are useful to simplify the expressions.

Ask a new question for Free

By Image

Drop file here or Click Here to upload

Math Problem Analysis

Mathematical Concepts

Limits
Taylor Series Approximation
Logarithmic Functions
Trigonometric Functions

Formulas

sin(x) ≈ x (for small x)
log(1+x) ≈ x (for small x)
Taylor series of sin(x)

Theorems

Limit Theorem
Taylor Series Expansion

Suitable Grade Level

Undergraduate Mathematics or Calculus